---@class pending.GcalConfig
---@field calendar? string
---@field credentials_path? string

---@class pending.SyncConfig
---@field gcal? pending.GcalConfig

---@class pending.Keymaps
---@field close? string|false
---@field toggle? string|false
---@field view? string|false
---@field priority? string|false
---@field date? string|false
---@field undo? string|false
---@field open_line? string|false
---@field open_line_above? string|false
---@field a_task? string|false
---@field i_task? string|false
---@field a_category? string|false
---@field i_category? string|false
---@field next_header? string|false
---@field prev_header? string|false
---@field next_task? string|false
---@field prev_task? string|false

---@class pending.Config
---@field data_path string
---@field default_view 'category'|'priority'
---@field default_category string
---@field date_format string
---@field date_syntax string
---@field recur_syntax string
---@field someday_date string
---@field category_order? string[]
---@field drawer_height? integer
---@field debug? boolean
---@field keymaps pending.Keymaps
---@field sync? pending.SyncConfig
---@field gcal? pending.GcalConfig

---@class pending.config
local M = {}

---@type pending.Config
local defaults = {
  data_path = vim.fn.stdpath('data') .. '/pending/tasks.json',
  default_view = 'category',
  default_category = 'Todo',
  date_format = '%b %d',
  date_syntax = 'due',
  recur_syntax = 'rec',
  someday_date = '9999-12-30',
  category_order = {},
  keymaps = {
    close = 'q',
    toggle = '<CR>',
    view = '<Tab>',
    priority = '!',
    date = 'D',
    undo = 'U',
    open_line = 'o',
    open_line_above = 'O',
    a_task = 'at',
    i_task = 'it',
    a_category = 'aC',
    i_category = 'iC',
    next_header = ']]',
    prev_header = '[[',
    next_task = ']t',
    prev_task = '[t',
  },
  sync = {},
}

---@type pending.Config?
local _resolved = nil

---@return pending.Config
function M.get()
  if _resolved then
    return _resolved
  end
  local user = vim.g.pending or {}
  _resolved = vim.tbl_deep_extend('force', defaults, user)
  if _resolved.gcal and not (_resolved.sync and _resolved.sync.gcal) then
    _resolved.sync = _resolved.sync or {}
    _resolved.sync.gcal = _resolved.gcal
  end
  return _resolved
end

---@return nil
function M.reset()
  _resolved = nil
end

return M